The Wanderer

This creature was once a human.
He lived in a thriving kingdom located in the arctic. They relied on special modules inserted into a reactor hidden in the castle, Fyrefly, to keep the kingdom warm. Everything was fine until the reactor was damaged. Before the kingdom fell into the depths of the arctic, he scavenged through the wreckage of the reactor, looking for the module that could save his life. When he finally found it, the cold had gotten to him, and instead of heating him up, Fyrefly changed him. The little blue crystal sprouted legs and made its way to his back. It ingested liquids into his bloodstream.
His body was altered to match the ice.
He realized that everyone he cared about was dead. Frozen.
He had nowhere to go to.
He wanders the snow, hopelessly searching for a home.
But they reject him.
He is a monster.